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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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固定香菇废弃菌柄对二元溶液中镉的吸附研究
DOI: 10.3724/SP.J.1145.2010.00114, PP. 114-117
Keywords: 香菇菌柄废弃物固定,干扰吸附,cd2+,聚乙烯醇？海藻酸钠,等温吸附
Abstract:
利用聚乙烯醇？海藻酸钠（pva-sa）固定香菇（lentinusedodes）菌柄废弃物作为生物吸附剂吸附溶液中的cd2+，吸附过滤后的溶液用原子吸收光谱仪（aas）测定cd2+的浓度.结果表明，一元溶液中固定香菇菌柄废弃物吸附cd2+适宜的ph值范围为4~7，比自由态香菇粉的（ph5~7）广；二元溶液中随着ph值的增加，cd2+的吸附率有线性增加的趋势；当固定cd2+浓度为10mgg-1，变化干扰离子cu2+或pb2+（0~30mgg-1）时，吸附剂对cd2+的吸附明显降低；分别用langmuir、freundlich、dubinin-radushkevich（d-r）和langmuir-freundlich等温吸附模型对一元和二元溶液中cd2+的等温吸附过程进行拟合，结果表明，langmuir吸附模型能较好地拟合一元溶液和cd2+-pb2+二元溶液中cd2+的等温吸附过程，相关系数r2分别为0.9981和0.9291.d-r模型能较好地拟合cd2+-cu2+二元溶液中cd2+的等温吸附过程，相关系数r2为0.9623.图1表7参11
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